@Test
public void testReachAgeLimit()
throws InvalidKeyException, SignatureException, IOException, InterruptedException {
long waitTime = 2000;
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer =
new MessageBuffer<Message>(Integer.MAX_VALUE, Long.MAX_VALUE, waitTime);
buffer.addListener(listener);
// create one message
buffer.addMessage(UtilsNAT.createRandomMessage(), 10);
// buffer did not trigger yet
assertEquals(0, listener.getTriggerCount());
assertEquals(0, listener.getBuffer().size());
// wait for the given time and slightly longer
Thread.sleep((long) (waitTime * 1.5));
// buffer triggered already
assertEquals(1, listener.getTriggerCount());
assertEquals(1, listener.getBuffer().size());
// wait again
Thread.sleep((long) (waitTime * 1.5));
// test that buffer did not trigger again
assertEquals(1, listener.getTriggerCount());
assertEquals(1, listener.getBuffer().size());
}
@Test
public void testBuffer() {
MessageBuffer b = new MessageBuffer();
b.append("Hello, world");
b.appendNewLine();
b.append("how are you?");
CharSequence s = b.getBuffer();
assertEquals("Hello, world\nhow are you?", s.toString());
}
@Test
public void testMaxSize() {
int max = 5;
MessageBuffer b = new MessageBuffer(5);
for (int i = 0; i < max * 2; i++) {
b.append("Line" + i + "\n");
}
String content = b.getBuffer().toString();
String expected = "(...)\nLine5\nLine6\nLine7\nLine8\nLine9\n";
assertEquals(expected, content);
}
@Test
public void testReachSizeLimit() throws InvalidKeyException, SignatureException, IOException {
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer =
new MessageBuffer<Message>(Integer.MAX_VALUE, 1, Long.MAX_VALUE);
buffer.addListener(listener);
// create one message
buffer.addMessage(UtilsNAT.createRandomMessage(), 2);
// buffer triggered already
assertEquals(1, listener.getTriggerCount());
assertEquals(1, listener.getBuffer().size());
}
@Test
public void testAppendBuffer() {
MessageBuffer b1 = new MessageBuffer();
b1.append("Line one");
int l = b1.getLength();
MessageBuffer b2 = new MessageBuffer();
b2.append(b1);
assertEquals("Wrong length", b2.getLength(), l);
b2 = new MessageBuffer();
b2.append("Some stuff");
int l2 = b2.getLength();
b2.append(b1);
assertEquals("Wrong length", b2.getLength(), l + l2);
}
// Run method
public void run(){
exptStartTime = (new Date()).getTime();
// create client to server (Event Listener)
Socket socket = null;
PrintWriter out = null;
try {
socket = new Socket (ipOfEventListener, portOfServer);
out = new PrintWriter(socket.getOutputStream(), true);
while (true){
while (msgBuffer.lock.tryLock()) {
// keep polling msgBuffer
while (!exptTimeUp() & msgBuffer.isEmpty())
; // get stuck here until msgBuffer contains something or experiment period is up
// send message to Event Listener & clear message buffer
out.println(msgBuffer.getWholeMsg());
System.out.println("Sent: "+ msgBuffer.getWholeMsg());
System.out.println("---");
msgBuffer.clear();
msgBuffer.lock.unlock();
}
// exit if period for experiment is up
if (exptTimeUp())
break;
}
// Cleanup
out.close();
socket.close();
}
catch (IOException e) {
System.err.println("*** FATAL ERROR: " + e.getMessage());
System.err.println("*** LIKELY REASON: Make sure Push Server is up and listening at the correct IP address and port.");
System.exit(1);
}
catch (Exception e){
System.err.println("*** FATAL ERROR: " + e.getMessage());
System.exit(1);
}
System.out.println("PushClient exited normally...");
}
/**
* Returns a {@code CompactId} constructed from the ID's external format contained in the
* specified message buffer.
*
* @param buf a message buffer containing the external format of a {@code CompactId}
* @return a {@code CompactId} constructed from the external format in the given message buffer
* @throws IllegalArgumentException if the external format contained in the message buffer is
* malformed or unsupported
*/
public static CompactId getCompactId(MessageBuffer buf) {
int bufSize = buf.limit() - buf.position();
if (bufSize == 0) {
throw new IllegalArgumentException("empty buffer");
}
byte lengthByte = buf.getByte();
int size = getExternalFormByteCount(lengthByte);
if (bufSize < size) {
throw new IllegalArgumentException("buffer size insufficient");
}
byte[] externalForm = new byte[size];
externalForm[0] = lengthByte;
for (int i = 1; i < size; i++) {
externalForm[i] = buf.getByte();
}
return CompactId.fromExternalForm(externalForm);
}
@Test
public void testBufferOrder()
throws InvalidKeyException, SignatureException, IOException, NoSuchAlgorithmException,
InvalidKeySpecException {
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer = new MessageBuffer<Message>(5, Long.MAX_VALUE, Long.MAX_VALUE);
buffer.addListener(listener);
// create five messages
Message first = UtilsNAT.createRandomMessage();
Message second = UtilsNAT.createRandomMessage();
Message third = UtilsNAT.createRandomMessage();
Message fourth = UtilsNAT.createRandomMessage();
Message fifth = UtilsNAT.createRandomMessage();
buffer.addMessage(first, RelayUtils.getMessageSize(first, signature));
buffer.addMessage(second, RelayUtils.getMessageSize(second, signature));
buffer.addMessage(third, RelayUtils.getMessageSize(third, signature));
buffer.addMessage(fourth, RelayUtils.getMessageSize(fourth, signature));
buffer.addMessage(fifth, RelayUtils.getMessageSize(fifth, signature));
// buffer triggered by now, check the order
List<Message> content = listener.getBuffer();
assertEquals(first.messageId(), content.get(0).messageId());
assertEquals(second.messageId(), content.get(1).messageId());
assertEquals(third.messageId(), content.get(2).messageId());
assertEquals(fourth.messageId(), content.get(3).messageId());
assertEquals(fifth.messageId(), content.get(4).messageId());
}
@Test
public void testBufferFlush()
throws InvalidKeyException, SignatureException, IOException, NoSuchAlgorithmException,
InvalidKeySpecException {
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer = new MessageBuffer<Message>(3, Long.MAX_VALUE, Long.MAX_VALUE);
buffer.addListener(listener);
// add two messages
buffer.addMessage(UtilsNAT.createRandomMessage(), 10);
buffer.addMessage(UtilsNAT.createRandomMessage(), 10);
buffer.flushNow();
// check whether the buffer has been pre-emptied
assertEquals(1, listener.getTriggerCount());
assertEquals(2, listener.getBuffer().size());
}
private Midi receiveBlocks(MessageBuffer messageBuffer, String message) {
Midi midi = null;
try {
int comma = message.indexOf(',', RSJM.length());
int equals = message.indexOf('=', comma);
int blockNumber = Integer.parseInt(message.substring(RSJM.length(), comma));
int blockCount = Integer.parseInt(message.substring(comma + 1, equals));
String block = message.substring(equals + 1);
messageBuffer.addBlock(blockNumber, blockCount, block);
if (messageBuffer.getBlockCount() == blockCount) {
String base64 = messageBuffer.consume();
midi = Midi.fromBase64(base64);
}
} catch (Exception e) {
e.printStackTrace();
}
return midi;
}
@Test
public void testGarbageCollect()
throws InvalidKeyException, SignatureException, IOException, InterruptedException {
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer = new MessageBuffer<Message>(2, Long.MAX_VALUE, Long.MAX_VALUE);
buffer.addListener(listener);
// create one message
buffer.addMessage(UtilsNAT.createRandomMessage(), 10);
// garbage collect
System.gc();
// create another message
buffer.addMessage(UtilsNAT.createRandomMessage(), 12);
// buffer triggered two messages
assertEquals(2, listener.getBuffer().size());
}
@Test
public void testReachCountLimit() throws InvalidKeyException, SignatureException, IOException {
CountingBufferListener listener = new CountingBufferListener();
MessageBuffer<Message> buffer = new MessageBuffer<Message>(3, Long.MAX_VALUE, Long.MAX_VALUE);
buffer.addListener(listener);
// create three messages
Message first = UtilsNAT.createRandomMessage();
Message second = UtilsNAT.createRandomMessage();
Message third = UtilsNAT.createRandomMessage();
buffer.addMessage(first, RelayUtils.getMessageSize(first, signature));
buffer.addMessage(second, RelayUtils.getMessageSize(second, signature));
// buffer did not trigger yet
assertEquals(0, listener.getTriggerCount());
assertEquals(0, listener.getBuffer().size());
// buffer triggered now
buffer.addMessage(third, RelayUtils.getMessageSize(third, signature));
assertEquals(1, listener.getTriggerCount());
assertEquals(3, listener.getBuffer().size());
}
protected final <T extends Message> IoBufferEx encode(
String cacheKey,
MessageEncoder<T> encoder,
T message,
IoBufferAllocatorEx<?> allocator,
int flags) {
ConcurrentMap<String, IoBufferEx> cache = message.getCache();
// if cache is not initialized, throw exception (caller should guard)
if (cache == null) {
throw new IllegalStateException("Cache not initialized");
}
// lookup existing cached encoding entry
IoBufferEx cachedBuffer = cache.get(cacheKey);
if (cachedBuffer == null) {
// when cachedBuffer is null, perform encode, then cache the result
// with standard atomic race condition awareness (put-if-absent)
if ((flags & FLAG_ZERO_COPY) != 0) {
if (!cache.isEmpty()) {
flags &= ~FLAG_ZERO_COPY;
}
}
IoBufferEx newCachedBuffer = encoder.encode(allocator, message, flags);
if (newCachedBuffer instanceof MessageBuffer<?>) {
MessageBuffer<?> cacheableBuffer = (MessageBuffer<?>) newCachedBuffer;
cacheableBuffer.setAutoCache(true);
}
cachedBuffer = cache.putIfAbsent(cacheKey, newCachedBuffer);
if (cachedBuffer == null) {
cachedBuffer = newCachedBuffer;
}
}
return cachedBuffer;
}
// Run method. Fires events periodically & ends when all events are fired.
public void run() {
int pointer = 0; // pointer used in delayIntervals array
// repeat until all the events have been fired
while (pointer < delayIntervals.size()) {
// extract delay interval
int nextDelayInterval = delayIntervals.get(pointer++).intValue();
// delay for nextDelayInternal number of seconds
delay(
nextDelayInterval
* 1000); // remember that delay intervals are given in seconds. so multiply by 1000
// before passing into the delay method
// An event happens here
Date rightNow = new Date();
System.out.println("Event " + pointer + " fired at time " + rightNow);
System.out.println("---");
// Create event message & append it to message buffer
msgBuffer.setMessageBufferText(createNewMessage(rightNow, '~', msgLength, '*'));
}
System.out.println("Exiting EventGenerator thread...");
}
/*
* This method handles RTSP server responses
* */
public void incomingMessage(MessageBuffer buffer) throws Exception {
// read a message bytes data in buffer
ByteArrayInputStream in =
new ByteArrayInputStream(buffer.getData(), buffer.getOffset(), buffer.getLength());
int initial = in.available();
Message message = null;
try {
String line = readLine(in);
if (line.startsWith(Message.RTSP_TOKEN)) {
message = new RtspResponse(line);
} else {
RtspRequest.Method method = null;
try {
method = RtspRequest.Method.valueOf(line.substring(0, line.indexOf(' ')));
} catch (IllegalArgumentException ilae) {
}
// 从Map中取出相应类型的Request信息
Class<? extends RtspRequest> cls = requestMap.get(method);
if (cls != null) message = cls.getConstructor(String.class).newInstance(line);
else message = new RtspRequest(line);
}
while (true) {
line = readLine(in);
if (in == null) throw new Exception();
if (line.length() == 0) break;
Constructor<? extends RtspHeader> c =
headerMap.get(line.substring(0, line.indexOf(':')).toLowerCase());
if (c != null) message.addHeader(c.newInstance(line));
else message.addHeader(new RtspHeader(line));
}
buffer.setMessage(message);
try {
int length = ((ContentLengthHeader) message.getHeader(ContentLengthHeader.NAME)).getValue();
if (in.available() < length) throw new Exception();
RtspContent content = new RtspContent();
content.setDescription(message);
byte[] data = new byte[length];
in.read(data);
content.setBytes(data);
message.setEntityMessage(new RtspEntityMessage(message, content));
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
throw new Exception(e);
} finally {
// TODO:读取后更新buffer状态
buffer.setused(initial - in.available());
// buffer.discardData();
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* Puts the external form of this {@code CompactId} in the specified message buffer.
*
* @param buf a message buffer
* @throws IllegalArgumentException if the message buffer size is insufficient
*/
public void putCompactId(MessageBuffer buf) {
if (buf.capacity() - buf.position() < externalForm.length) {
throw new IllegalArgumentException("buffer size insufficient");
}
buf.putBytes(externalForm);
}